A recessed luminaire includes a housing supporting a light emitter, an intumescent material coupled to an outer surface of the housing, and a plate coupled to the housing and to the intumescent material. The housing configured to be positioned at least partially through a ceiling. The housing also includes a stepped surface. The intumescent material has a shape complementary to a shape of the housing. The plate is positioned adjacent to the stepped surface and to an upper surface of the intumescent material.

An assembly for an opening through a member has a body and a first spring retention assembly coupled to the body. The first spring retention assembly has a first coil spring at least partially disposed within a first spring housing. The first coil spring has a first end extending through the first spring housing and is coupled to the body. The first coil spring is extendable from and retractable into the first spring housing.

A downlight apparatus has a rotatable base, a light module and a front cover. The light is rotatable in a spherical rotating space defined by the rotatable base. There is a stop structure for keeping the light module staying at rotating angle with respect to the rotatable base when there is no external force applying on the light module.

A luminaire is configured to be removably coupled to a fixture, the fixture being removably coupled to a splice box, the luminaire including a housing including a first end and a second end, the first end including a coupling mechanism configured to couple to the fixture; a printed circuit board coupled adjacent the second end; at least one LED physically and electrically coupled to the printed circuit board; a lens couple to the housing over the printed circuit board; an adapter in electrical communication with the printed circuit board, the adapter configured to electrically and physically couple to a socket of the fixture.

A lighting fixture includes a light source holder, a pair of position adjustors, and an outer shell. The light source holder holds a light source. The position adjustors are arranged to face each other and interpose the light source holder between themselves and supports the light source holder to allow the light source holder to rotate around a first virtual axis defined as a virtual axis passing through the position adjustors. The outer shell has an opening in which the light source holder and the position adjustors are arranged and supports the position adjustors to allow the position adjustors to rotate around a second virtual axis defined by a normal to an opening plane of the opening. The first virtual axis intersects with the second virtual axis and is located either within or behind the opening plane.

A lighting fixture includes a light source holder, a pair of position adjustors, and an outer shell. The light source holder holds a light source. The position adjustors are arranged to face each other and interpose the light source holder between themselves and supports the light source holder to allow the light source holder to rotate around a first virtual axis defined as a virtual axis passing through the position adjustors. The outer shell has an opening in which the light source holder and the position adjustors are arranged and supports the position adjustors to allow the position adjustors to rotate around a second virtual axis defined by a normal to an opening plane of the opening. The first virtual axis intersects with the second virtual axis and is located either within or behind the opening plane.

A mounting profile for lighting system of suspended ceiling, which comprises a comprehensive triple-section aluminium profile, where repositionable wireless luminaires fitted with magnets can be used on the mounting profile and comprises devices for fastening stretch ceiling material as well as other types of suspended ceiling materials thereto.

A connection system is provided for modular luminaires, wherein the luminaires are each provided with at least one tapered pillar projecting from a back, the pillar having a top opening. A coupling arrangement is used for coupling the two luminaires together, in the form of a bridge having first and second tapered openings for fitting over the pillars. A sprung retaining clip projects within each opening for passing through the top opening and thereby gripping the pillar.

A system for improving an appearance of light from an excimer lamp includes the excimer lamp configured to output excimer light that includes ultraviolet light having an ultraviolet wavelength and visible light having a first visible wavelength or spectra. The system further includes at least one additional light source configured to be packaged with the excimer lamp and to output additional light having a second visible wavelength or spectra. The system further includes a cover that is at least one of transparent or translucent to the ultraviolet wavelength and having a surface pattern that causes the excimer light to blend with the additional light.

An illumination module for a test chamber, a test chamber and a method for modifying a test chamber. The test chamber includes a temperature-insulated test space sealable against an environment for receiving test material. The illumination module can be disposed at least partially in the test space to illuminate the test space and includes an illuminant and a socket, a wall duct and a light conducting device. The wall duct is disposed in a wall surrounding the test space and extends from an inner side to an outer side of the wall. The light conducting device has a light exit area and a light entry area and is disposed within the wall duct. The socket is disposed at the outer end positioning the illuminant at the light entry area. The light exit area is disposed at the inner end.